新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (6): 752-755.

• 应用技术 • 上一篇    下一篇

近地表速度菲涅耳带初至层析反演

朱生旺   

  1. 中国石化 石油勘探开发科学研究院, 北京 100083
  • 收稿日期:2006-03-26 出版日期:2007-12-01 发布日期:2020-08-03
  • 作者简介:朱生旺(1962-), 男, 安徽太湖人, 教授级高级工程师, 博士, 地球物理,(Tel) 010-82312646. (E-mail) zhusw@pepris.com.

Tomographic Inversion of First Arrival Refraction in Fresnel Zone with Near-Surface Velocity

ZHU Sheng-wang   

  1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China
  • Received:2006-03-26 Online:2007-12-01 Published:2020-08-03

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摘要： 近地表初至层析反演静校正是解决复杂地表静校正问题的有效方法之一。基于层析反演的基本算法原理,采用线性插值逐层扩张的方法进行旅行时计算,并对射线追踪方法进行改进,使射线追踪结果更加稳定可靠,在方程组构建中采用菲涅耳带取代传统的数学射线,提高了抗初至拾取误差的能力。理论和实都证实了该方法的有效性。

关键词: 射线追踪, 层析反演, 静校正, 菲涅耳带

Abstract: The tomographic inversion of near-surface velocities is one of effective approaches to improve the accuracy of static correction in surface-complicated area. Based on the basic principle of tomographic inversion, a method for layer-by-layer extension with travel time linear interpolation is introduced in ray tracing, which helps to get more accurate ray-paths. Instead of using conventional mathematical ray-path, the conception of Fresnel zone is used to establish the inversion equations, which enhances the resistance to the error originated from first-break picking. The advantage of the method is proved both by theoretical calculation and real application.

Key words: ray tracing, tomography inversion, static correction, Fresnel zone

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